Field Installed Assembly and Installation
ACC-SVN261A-EN 9
without movement, it can be assumed it is at the new
position.
3. Replace the filter access panel.
The damper will close when the blower circuit is
de-energized.
Dry Bulb Settings
Standard economizer dry bulb changeover is field selectable
and has a range of 50-140ºF.
Reference Enthalpy Settings
Economizer enthalpy changeover is field selectable and has a
range of 50-140°F. The default is 60°F. This selection can be
made using the Symbio™ service and installation mobile app
or Symbio™ 700 on-board UI.
Table 1. Precedent economizer control options
Control Option Enable Conditions Option Sensor Required
Comparative Enthalpy
Outside Air Enthalpy < Return Air Enthalpy – Econ Enthalpy
Of
fset AND Outside Air Temperature < Economizer Drybulb
Setpoint – Econ DryBulb Offset
Outdoor Air Temperature Sensor
Outdoor Air Humidity Sensor
Return Air Temperature Sensor
Return Air Humidity Sensor
Reference Enthalpy
Outside Air Enthalpy < Reference Enthalpy Setpoint
–
Econ Enthalpy Offset AND
Outside Air Temperature < Economizer Drybulb Setpoint
- Econ
DryBulb Offset
Outdoor Air Temperature Sensor
Outdoor Air Humidity Sensor
Dry Bulb
OA Temp < [Economizer Outdoor Air Enable Setpoint BAS
- Economi
zer Dry Bulb Enable Offset]
Outdoor Air Temperature Sensor
Differential Dry Bulb
OA Temp < RA Temp - Economizer Dry Bulb Enable Offset
- E
conomizer Dry Bulb Disable Return Air Offset
Outdoor Air Temperature Sensor
Return Air Temperature Sensor
Wiring Connections
Refer to main unit schematic sheet 6 for electrical
connections to Fresh air module located in return section
control box, See Figure 9, p. 9.
After installation is complete, the Symbio™ 700 UC
co
nfiguration will need to be updated to enable this
installed feature. Refer to ACC-APG002*-EN.
Figure 9. Fresh air options module location
Fresh air options
module access (B and C cabinet)
Fresh air options
module access (D cabinet)
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